Waters, Paul; Delbridge, Margaret; Deakin, Janine; El-Mogharbel, Nisrine; Kirby, Patrick J; Carvalho-Silva, D; Graves, Jennifer
Mammalian sex chromosomes evolved from an ancient autosomal pair. Mapping of human X- and Y-borne genes in distantly related mammals and non-mammalian vertebrates has proved valuable to help deduce the evolution of this unique part of the genome. The platypus, a monotreme mammal distantly related to eutherians and marsupials, has an extraordinary sex chromosome system comprising five X and five Y chromosomes that form a translocation chain at male meiosis. The largest X chromosome (X1), which...[Show more]
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